High 8.8Published May 27, 2026

CVE-2026-46056Bluetooth: hci_event: fix potential UAF in SSP passkey handlers

Updated under an hour ago (Oct 26, 2026, 8:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise the connection can be freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage in both handlers. Keep the existing keypress notification behavior unchanged by routing the early exits through a common unlock path.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 92a25256f142d55e25f9959441cea6ddeabae57e before ea18732d2614557e59f4c0d8cdbe6611aeab33b7; from 92a25256f142d55e25f9959441cea6ddeabae57e before d28311539ac9f65e29308ea219ecaa48aa5e76e5; from 92a25256f142d55e25f9959441cea6ddeabae57e before b6ae482f88654db407c8c17619d4b62959b903ef; from 92a25256f142d55e25f9959441cea6ddeabae57e before 204028af77a265e31ceb4ba7f643349a3cca72b2; 92a25256f142d55e25f9959441cea6ddeabae57e builds before 01a6431766c35dfedb86e0cb5d3fc80c6d604a47; from 92a25256f142d55e25f9959441cea6ddeabae57e before e08d75753db17aa943d7622f09d9c217b5bfd3b8; 92a25256f142d55e25f9959441cea6ddeabae57e builds before 8c6443bb9257b780986fb67ec08565bf48ecb8d7; 92a25256f142d55e25f9959441cea6ddeabae57e builds before 85fa3512048793076eef658f66489112dcc91993	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 3.7 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4	NVD

References

References

https://git.kernel.org/stable/c/ea18732d2614557e59f4c0d8cdbe6611aeab33b7
https://git.kernel.org/stable/c/d28311539ac9f65e29308ea219ecaa48aa5e76e5
https://git.kernel.org/stable/c/b6ae482f88654db407c8c17619d4b62959b903ef	patch
https://git.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2	patch
https://git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47	patch
https://git.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8	patch
https://git.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7	patch
https://git.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.